RHSA-2017:1856

Vulnerability from csaf_redhat - Published: 2017-08-01 14:03 - Updated: 2026-02-19 22:34
Summary
Red Hat Security Advisory: qemu-kvm security, bug fix, and enhancement update
Severity
Moderate
Notes
Topic: An update for qemu-kvm is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm package provides the user-space component for running virtual machines that use KVM. Security Fix(es): * An out-of-bounds memory access issue was found in Quick Emulator (QEMU) in the VNC display driver. This flaw could occur while refreshing the VNC display surface area in the 'vnc_refresh_server_surface'. A user inside a guest could use this flaw to crash the QEMU process. (CVE-2017-2633) * An integer overflow flaw was found in Quick Emulator (QEMU) in the CCID Card device support. The flaw could occur while passing messages via command/response packets to and from the host. A privileged user inside a guest could use this flaw to crash the QEMU process. (CVE-2017-5898) * An information exposure flaw was found in Quick Emulator (QEMU) in Task Priority Register (TPR) optimizations for 32-bit Windows guests. The flaw could occur while accessing TPR. A privileged user inside a guest could use this issue to read portions of the host memory. (CVE-2016-4020) Red Hat would like to thank Li Qiang (360.cn Inc.) for reporting CVE-2017-5898 and Donghai Zdh (Alibaba Inc.) for reporting CVE-2016-4020. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2016-4020

An information-exposure flaw was found in Quick Emulator (QEMU) in Task Priority Register (TPR) optimizations for 32-bit Windows guests. The flaw could occur while accessing TPR. A privileged user inside a guest could use this issue to read portions of the host memory.

3.4 (Low)
CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect. https://access.redhat.com/errata/RHSA-2017:1856
CVE-2017-2633

An out-of-bounds memory access issue was found in Quick Emulator (QEMU) in the VNC display driver. This flaw could occur while refreshing the VNC display surface area in the 'vnc_refresh_server_surface'. A user inside a guest could use this flaw to crash the QEMU process.

5.4 (Medium)
CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect. https://access.redhat.com/errata/RHSA-2017:1856
CVE-2017-5898

An integer overflow flaw was found in Quick Emulator (QEMU) in the CCID Card device support. The flaw could occur while passing messages via command/response packets to and from the host. A privileged user inside a guest could use this flaw to crash the QEMU process.

4.0 (Medium)
CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L
CWE-190 - Integer Overflow or Wraparound
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect. https://access.redhat.com/errata/RHSA-2017:1856
References
https://access.redhat.com/errata/RHSA-2017:1856 self
https://access.redhat.com/security/updates/classi… external
https://access.redhat.com/documentation/en-US/Red… external
https://bugzilla.redhat.com/show_bug.cgi?id=1151859 external
https://bugzilla.redhat.com/show_bug.cgi?id=1299875 external
https://bugzilla.redhat.com/show_bug.cgi?id=1313686 external
https://bugzilla.redhat.com/show_bug.cgi?id=1342489 external
https://bugzilla.redhat.com/show_bug.cgi?id=1361488 external
https://bugzilla.redhat.com/show_bug.cgi?id=1375507 external
https://bugzilla.redhat.com/show_bug.cgi?id=1377087 external
https://bugzilla.redhat.com/show_bug.cgi?id=1377977 external
https://bugzilla.redhat.com/show_bug.cgi?id=1378541 external
https://bugzilla.redhat.com/show_bug.cgi?id=1419699 external
https://bugzilla.redhat.com/show_bug.cgi?id=1419898 external
https://bugzilla.redhat.com/show_bug.cgi?id=1425939 external
https://bugzilla.redhat.com/show_bug.cgi?id=1427176 external
https://bugzilla.redhat.com/show_bug.cgi?id=1430606 external
https://bugzilla.redhat.com/show_bug.cgi?id=1433920 external
https://bugzilla.redhat.com/show_bug.cgi?id=1436280 external
https://bugzilla.redhat.com/show_bug.cgi?id=1440987 external
https://bugzilla.redhat.com/show_bug.cgi?id=1441778 external
https://bugzilla.redhat.com/show_bug.cgi?id=1451470 external
https://bugzilla.redhat.com/show_bug.cgi?id=1452067 external
https://bugzilla.redhat.com/show_bug.cgi?id=1456983 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2016-4020 self
https://bugzilla.redhat.com/show_bug.cgi?id=1313686 external
https://www.cve.org/CVERecord?id=CVE-2016-4020 external
https://nvd.nist.gov/vuln/detail/CVE-2016-4020 external
https://access.redhat.com/security/cve/CVE-2017-2633 self
https://bugzilla.redhat.com/show_bug.cgi?id=1425939 external
https://www.cve.org/CVERecord?id=CVE-2017-2633 external
https://nvd.nist.gov/vuln/detail/CVE-2017-2633 external
https://access.redhat.com/security/cve/CVE-2017-5898 self
https://bugzilla.redhat.com/show_bug.cgi?id=1419699 external
https://www.cve.org/CVERecord?id=CVE-2017-5898 external
https://nvd.nist.gov/vuln/detail/CVE-2017-5898 external
Acknowledgments
Alibaba Inc. Donghai Zdh
360.cn Inc. Li Qiang
To clipboard 

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        {
          "names": [
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          "organization": "Alibaba Inc."
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      "cve": "CVE-2016-4020",
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          "text": "1313686"
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        {
          "category": "description",
          "text": "An information-exposure flaw was found in Quick Emulator (QEMU) in Task Priority Register (TPR) optimizations for 32-bit Windows guests. The flaw could occur while accessing TPR. A privileged user inside a guest could use this issue to read portions of the host memory.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "Qemu: i386: leakage of stack memory to guest in kvmvapic.c",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle:\nhttps://access.redhat.com/support/policy/updates/errata/.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "Qemu: VNC: memory corruption due to unchecked resolution limit"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Li Qiang"
          ],
          "organization": "360.cn Inc."
        }
      ],
      "cve": "CVE-2017-5898",
      "cwe": {
        "id": "CWE-190",
        "name": "Integer Overflow or Wraparound"
      },
      "discovery_date": "2016-12-02T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1419699"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "An integer overflow flaw was found in Quick Emulator (QEMU) in the CCID Card device support. The flaw could occur while passing messages via command/response packets to and from the host. A privileged user inside a guest could use this flaw to crash the QEMU process.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "Qemu: usb: integer overflow in emulated_apdu_from_guest",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2017-5898"
        },
        {
          "category": "external",
          "summary": "RHBZ#1419699",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1419699"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2017-5898",
          "url": "https://www.cve.org/CVERecord?id=CVE-2017-5898"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2017-5898",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-5898"
        }
      ],
      "release_date": "2017-02-03T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2017-08-01T14:03:36+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nAfter installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect.",
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            "integrityImpact": "PARTIAL",
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            "integrityImpact": "LOW",
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            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L",
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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "Qemu: usb: integer overflow in emulated_apdu_from_guest"
    }
  ]
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.